How to add an interceptor for mcp tool?

[24kpure]

java-sdk/mcp-spring/mcp-spring-webmvc/src/main/java/io/modelcontextprotocol/server/transport/WebMvcSseServerTransportProvider.java

Line 328 in 082444e

final McpTransportContext transportContext = this.contextExtractor.extract(request);

I want to add interceptors for MCP tool, but I don't know how to add them.If I want to get something from request'body, I can't get them through this contextExtractor for the body stream can only be read once.

[alexcheng1982]

You can add a servlet filter to intercept the request.

To support re-read of request body, you can use wrapper like ContentCachingRequestWrapper from Spring to cache the request body.

contextExtractor cannot work here, it doesn't you to replace the HttpServletRequest with a cachable one.